I don't know why my question suddenly got a slightly changed header - my phone number IS active, not that it helps, as long as the verification addresses are outdated. Anyway, I've been reading some of the questions on the same topic, and I understand now that there is absolutely no support - just running around in circles on the help pages, and serious questions get a "Solved" stamp although nobody has provided any sort of solution. It's clear that a free account service is worth exactly what you pay for it. So, I'm now giving up the account I have all the login information for but can't get into because it wants a verification too - for no reason at all, just because I've logged in from another device once or twice. Moreover, I'm going to delete the two accounts that I actually managed to recover - in spite of Yahoo - and I'll never use Yahoo again, and I'll dissuade anyone who asks if it's any good. Yahoo is aptly named - I take it that it's named for the savages in 'Gulliver's Travels. I'm amazed that it took me nearly 20 years of use to discover how bad Yahoo really is, but when I think back, it wasn't always so. Back when the millennium was young, Yahoo actually worked surprisingly well. That's not the case any more. Time burn one's accounts and move on.
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For some reason - probably only that I had logged in from different devices, I keep getting the "We have detected unusual activity ..." message when I try to log in to my account. I know my ID and password, but the problem is, none of the three email addresses that I submitted for recovery purposes, are valid anymore (I'm no longer with those ISP's). So, I have all information necessary to log in, but not to verify, unless I can log in and change my verification addresses. I should be able to use my phone number - it has worked fine for two other accounts - but I don't seem to get a chance to enter it to verify the third account - or it only brings up the other two. I'm sure the account is still active, I just can't get to it. It's very frustrating, because there wouldn't be a problem with the login, if it weren't for the outdated verification methods.
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